Then again, I am not sure of the ethics of using a School's database if you are not a member of that school. And a legitimate support unit will have a copy of the database - even if it is just the Training databse. Not sure of the ethics of using that one either!
Still, ethics aside, the process is really very, very simple.
I have posted a number of reports on File Sharing and I would asume that schools using them have edited them and called them their own! I share them freely for others to use. I would assume that anybody else doing this would do it for the same reasons that I do - to help fellow SIMS Users!